Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdf5b194f3e18cd…

MALICIOUS

PDF

71.6 KB Created: 2021-03-25 13:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 084ef7f61d2a9668f541990338f71f9e SHA-1: a8fa517a88c59e79e22f4e651cf6732918766a3d SHA-256: afdf5b194f3e18cd3dc9da92805b744ef2591fafe23c04351ac3a03c91d51c30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://jumiwimov.ru/strik, which is likely used to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/strik?utm_term=attack+on+titan+manga+online+137+release+date
    • http://samo-katim.ru/woodcock_johnson_iv_scoringqulhy.pdf
    • http://itabody.space/nerf_cutan_latral_de_la_cuisse_douleurgigln.pdf
    • http://kidufamipowanot.mywebcommunity.org/gomapeboparu.pdf
    • http://nitiwomifigurod.mygamesonline.org/mind_over_markets_podcast.pdf
    • http://xepewifub.mygamesonline.org/the_wild_unknown_tarot_deck_and_guidebook_official_keepsake_box_set_book.pdf
    • http://zavarivaemvmeste.ru/zirikewojisutixusad9ilzg.pdf
    • http://prostochillforum.fun/90287001285gwzh1.pdf
    • http://stav-games.ru/ambient_display_android_marshmallowffqjr.pdf
    • http://prizinsta365.website/why_did_katniss_want_to_kill_finnickquvtp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3f77fc48-1c5b-41fc-93a0-3a19d4b1e0aa/relion_blood_pressure_monitor_hem-741crel_4g.pdf
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_ecdf603fef254df188369015435e4911.pdf?index=true
    • https://uploads.strikinglycdn.com/files/45ec9298-8fb2-4861-9781-a74e9663cecf/canon_powershot_sx110_is_compatible_memory_cards.pdf
    • https://uploads.strikinglycdn.com/files/80cf34f9-73f1-4d86-b9ac-8d1f48c172f3/ryobi_2000_psi_pressure_washer_parts_list.pdf
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_87698245100b45e48a521253562e3a12.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4948be1f-e780-4db7-934e-4f1c513b4fbf/99013273787.pdf
    • https://uploads.strikinglycdn.com/files/c64f28bb-d1f6-4b33-b497-cf1fd72775d0/5875277016.pdf
    • http://tososite.onlinewebshop.net/welinaredaxivajedatomiti.pdf
    • https://uploads.strikinglycdn.com/files/24a5b4f9-7a1c-421e-9f25-6a33153fea84/how_to_take_apart_mr_coffee_espresso_machine.pdf
    • https://uploads.strikinglycdn.com/files/f924c3b5-a0bd-42d8-bdf6-7a29d504771e/multiplayer_zombie_survival_games_xbox_one.pdf
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_a0a0fe94c7ff4b42ac15189e8af26ccf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a0ddfd39-7ec1-4f67-a151-5d1d028f4eee/86773351857.pdf
    • http://xasejumav.onlinewebshop.net/adobe_reader_for_mac_update.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d98a.bin
ca0a03f64fec20260043f9367ca792e4b487572d1646960cf2367a95079e6e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 5608 bytes
font_01_sfnt_off0000ec93.bin
e438ccd46b16cf9de21b339bf372ab9067c9a8a63914acad3f451a8d255286a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC93 10816 bytes

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